Trump waves green flag to start IndyCar race through Washington streets

What happened

The president took a ceremonial lap of the track before the race, which is the culmination of a summer of events to mark the country's 250th birthday.

Summary assembled by rule from the sources below

Timeline

1. 16:57
   First appeared on BBC WorldBBBC World
2. 20:19
   BBC Sport started reportingBBBC Sport

Sources